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Revision as of 17:40, 14 May 2021
| 2021 North Indian Ocean cyclone season | |
|---|---|
 Season summary map | |
| Seasonal boundaries | |
| First system formed | April 2, 2021 |
| Last system dissipated | Season ongoing |
| Strongest storm | |
| Name | ARB 01 |
| • Maximum winds | 55 km/h (35 mph) (3-minute sustained) |
| • Lowest pressure | 1000 hPa (mbar) |
| Seasonal statistics | |
| Depressions | 2 |
| Deep depressions | 1 |
| Total fatalities | 0 |
| Total damage | $0,000 (2021 USD) |
| Related articles | |
The 2021 North Indian Ocean cyclone season is an ongoing event of the annual cycle of tropical cyclone formation. The North Indian Ocean cyclone season has no official bounds, but cyclones tend to form between April and December, with the peak from May to November. These dates conventionally delimit the period of each year when most tropical cyclones form in the northern Indian Ocean.
The scope of this article is limited to the Indian Ocean in the Northern Hemisphere, east of the Horn of Africa and west of the Malay Peninsula. There are two main seas in the North Indian Ocean — the Arabian Sea to the west of the Indian subcontinent, abbreviated ARB by the India Meteorological Department (IMD); and the Bay of Bengal to the east, abbreviated BOB by the IMD.
The official Regional Specialized Meteorological Centre in this basin is the India Meteorological Department (IMD), while the Joint Typhoon Warning Center releases unofficial advisories. On average, three to four cyclonic storms form in this basin every season.[1]
Season summary
The basin was quiet until April 2, in which a depression near the Myanmar coast in the North Andaman Sea formed. It was considered rare since the first storm of a season usually forms from mid-April to May, however it dissipated the next day. After a month of inactivity, another depression formed off the coast of Kerala and Lakshadweep. It intensified into a deep depression the same day.
Systems
Depression BOB 01
| Depression (IMD) | |
  | |
| Duration | April 2 – April 3 |
|---|---|
| Peak intensity | 45 km/h (30 mph) (3-min); 1000 hPa (mbar) |
On March 31 at 00:00 UTC (05:30 IST), a low pressure system formed south of the Andaman Sea. It gradually intensified into a well-marked low pressure area on April 1 at 09:00 UTC (14:30 IST). Favourable conditions helped to intensify the system into a depression on April 2 at 00:00 UTC (05:30 IST). On April 3 at 06:00 UTC (11:30 IST), it moved north-northeastwards towards the Myanmar coast and IMD downgraded the system to a well-marked low pressure.[2]
The influence of the system caused light to moderate rainfall in most places of Andaman Islands and heavy rainfall in few places. The system's remnant caused isolated rainfall over the Myanmar coast. Estimated winds of up to 40 to 50 km/h (25 to 30 mph) gusting up to 60 km/h (35 mph) were recorded on the island.[2] The first tropical depression of the basin, it was also a rare disturbance since it formed in early April while the most cyclogenesis occurs during mid-April or throughout May.[2]
Deep Depression ARB 01
| |||
|---|---|---|---|
| |||
| As of: | 20:30 IST, May 14 15:00 UTC, May 14 | ||
| Location: | 11°36′N 72°36′E / 11.6°N 72.6°E About 55 km (34 mi) NNW of Amini Divi, 290 km (180 mi) WSW of Kannur, 1,060 km (660 mi) SSE of Veraval | ||
| Sustained winds: | 30 kn (55 km/h; 35 mph) (3-min mean) gusting to 40 kn (75 km/h; 45 mph) 40 kn (75 km/h; 45 mph) (1-min mean) | ||
| Pressure: | 999 hPa (29.50 inHg) | ||
| Movement: | NNE at 5 kn (10 km/h; 5 mph) | ||
| See latest official information. | |||
On May 14, a depression formed in the Arabian Sea off the coast of Kerala.[3] Meanwhile JTWC also followed and designated as Tropical Cyclone 01A.[4] It gradually intensified, and became a deep depression on 12:00 UTC.[5]
Heavy rainfall was reported over areas of Kerala, with the IMD advising fishermen not to sail in the area.[6] Parts of Kerala and Lakshadweep were placed under a red alert.[7] As of 12:00 UTC, rainfall warnings were imposed in parts of Lakshadweep, Kerala, Tamil Nadu's ghats districts, coastal districts of Karnataka, Goa, Gujarat and Southwestern Rajasthan.[5]
Current storm information
As of 20:30 IST, May 14 (15:00 UTC, May 14), Deep Depression ARB 01 is located 11°36′N 72°36′E / 11.6°N 72.6°E, which is approximately 55 km (34 mi) north-northwest of Amini Divi, 290 km (180 mi) west-southwest of Kannur and 1,060 km (660 mi) south-southeast of Veraval. Maximum 3-minute sustained winds are at 30 kn (55 km/h; 35 mph) with gusting up to 40 kn (75 km/h; 45 mph). Maximum 1-minute sustained winds are at 40 kn (75 km/h; 45 mph). The system's central barometric pressure is 999 hPa (29.50 inHg). The system is moving north-northeastwards at 5 kn (10 km/h; 5 mph).
For the latest official information see:
- IMD's Special Tropical Cyclone Outlook for Deep Depression ARB 01
- JTWC's Tropical Cyclone Warning for Tropical Cyclone 01A (One)
Watches and warnings
| Cyclone watch Cyclonic storm conditions expected within 72 hours. |
|
| Source: IMD | |
Storm names
Within this basin, a tropical cyclone is assigned a name when it is judged to have reached cyclonic storm intensity with winds of 65 km/h (40 mph). The names were selected by a new list from the Regional Specialized Meteorological Center in New Delhi by mid year of 2020. There is no retirement of tropical cyclone names in this basin as the list of names is only scheduled to be used once before a new list of names is drawn up. Should a named tropical cyclone move into the basin from the Western Pacific, then it will retain its original name. The next eight available names from the List of North Indian Ocean storm names are below.[8]
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|
Season effects
This is a table of all storms in the 2021 North Indian Ocean cyclone season. It mentions all of the season's storms and their names, duration, peak intensities (according to the IMD storm scale), damage, and death totals. Damage and death totals include the damage and deaths caused when that storm was a precursor wave or extratropical low, and all of the damage figures are in 2021 USD.
| Name | Dates | Peak intensity | Areas affected | Damage (USD) |
Deaths | Refs | ||
|---|---|---|---|---|---|---|---|---|
| Category | Wind speed | Pressure | ||||||
| BOB 01 | April 2 – 3 | Depression | 45 km/h (30 mph) | 1000 hPa (29.53 inHg) | Andaman and Nicobar Islands, Myanmar | None | 0 | |
| ARB 01 | May 14 – Present | Deep Depression | 55 km/h (35 mph) | 1000 hPa (29.53 inHg) | Maldives, Kerala, Lakshadweep | None | 0 | |
| Season aggregates | ||||||||
| 2 systems | April 2 – Season ongoing | 55 km/h (35 mph) | 1000 hPa (29.53 inHg) | Unknown | 0 | |||
See also
- Tropical cyclones in 2021
- 2021 Atlantic hurricane season
- 2021 Pacific hurricane season
- 2021 Pacific typhoon season
- South-West Indian Ocean cyclone seasons: 2020–21, 2021–22
- Australian region cyclone seasons: 2020–21, 2021–22
- South Pacific cyclone seasons: 2020–21, 2021–22
References
- ^ "Annual Frequency of Cyclonic Disturbances (Maximum Wind Speed of 17 Knots or More), Cyclones (34 Knots or More) and Severe Cyclones (48 Knots or More) Over the Bay of Bengal (BOB), Arabian Sea (AS) and Land Surface of India" (PDF). India Meteorological Department. Archived (PDF) from the original on 15 December 2017. Retrieved 30 October 2015.
- ^ a b c "Preliminary Report on Depression April 2021.pdf" (PDF). India Meteorological Department. Archived (PDF) from the original on 2021-04-25. Retrieved 2021-04-25.
- ^ "Special Tropical Weather Outlook For North India Ocean". mausam.imd.gov.in. Archived from the original on 2020-07-25. Retrieved 2021-05-14.
- ^ "Tropical Cyclone Warning for Tropical Cyclone 01A". Joint Typhoon Warning Centre. 2021-05-14. Archived from the original on 2021-05-14. Retrieved 2021-05-14.
- ^ a b "Special Tropical Cyclone Outlook for North Indian Ocean 02". mausam.imd.gov.in. Archived from the original on 2021-05-14. Retrieved 2021-05-14.
- ^ "Cyclone Tauktae: South Kerala reports heavy rainfall". Big News Network. May 14, 2021. Retrieved May 14, 2021.
- ^ "Cyclone, Weather Forecast Live Updates: NDRF deploys 24 teams after cyclonic warning; Red alert in Kerala, Lakshadweep". The Indian Express. May 14, 2021. Retrieved May 14, 2021.
- ^ "Tropical Cyclone Names" (PDF). India Meteorological Department. Archived (PDF) from the original on 14 May 2021. Retrieved 2 April 2021.
External links
- RSMC New Delhi
- Indian Meteorological Department
- Joint Typhoon Warning Center (JTWC)
- National Meteorological Center of CMA (in Chinese)
Tropical cyclones of the 2021 North Indian Ocean cyclone season | ||
|---|---|---|
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